Peugeot Seatpost Ideas........

So I want to put a proper seatpost on my Peugeot, but it has a 23.4mm seatpost dia. So would turning down a 25mm or 25.4mm seatpost be risky......tubing walls to thin...? Has anyone done this with no problems?

Thanks agian! I think that will be fine then, as 3mil is pretty thick for sure. Going from 118ish thou to 89ish thou still leaves a pretty thick walled tube. I'm pretty skinny for my size (175ibs) so you have reasured me this will work and I can get the seat angle properly set. Stupid bung seat thinie wont hold it right.